This erratum corrects an error in a sign in an equation. |
Equation (4) in this paper [J. Nanophoton. 5(1), 053527 (2011) [doi: 10.1117/1.3663210] has a sign error: The correct Eq. (4) is as follows: Other equations, results, and conclusions are not affected by this typographical error. All versions of the article were corrected on 12 March 2020. |